This is all about where Bitcoin *could* be gaining traction.
It seems that mobile operators are moving into this space instead, using proprietary interfaces and electronic accounts in local currencies.
Bill Gates talks about "digital currency" and its potential impact (at approx 10:20 into the interview):
http://www.charlierose.com/view/interview/12436(link from the Coinbase blog)
More about mobile payment / digital currency in Kenya:
http://c251808.r8.cf3.rackcdn.com/86336_small_5.pdfComments?